During the Credits
During the credits of Jack and Jill more clips of twins being interviewed are shown just like in the beginning of the film. The interviews last the entire length of the end credits with the twins describing funny situations and making fun of their siblings.
After the Credits
After the credits of Jack and Jill there is one final clip of a lone twin from one of the documentary interviews that was shown during the end credits. He doesn’t say anything, but does a stupid human trick where he pretends to pump up his stomach and then pop it.